Monitored Data - ABB Relion Technical Manual

1MRK 502 048-UUS A
Name Values (Range)
t1Min 0.000 - 60.000
TD1 0.05 - 1.10
OperationStep2 Disabled
Enabled
OpMode2 1 out of 3
2 out of 3
3 out of 3
Pickup2 1 - 100
t2 0.000 - 60.000
Table 157: UV2PTUV (27) Non group settings (basic)
Name Values (Range)
GlobalBaseSel 1 - 6
ConnType PhN DFT
PhN RMS
PhPh DFT
PhPh RMS
9.1.6
9.1.7
Technical manual
Unit Step
s 0.001
- 0.01
- -
- -
%VB 1
s 0.001
Unit Step
- 1
- -

Monitored data

Table 158: UV2PTUV (27) Monitored data
Name Type
V_A REAL
V_B REAL
V_C REAL
Operation principle
Two-step undervoltage protection (UV2PTUV ,27) is used to detect low power system
voltage. UV2PTUV (27) has two voltage measuring steps with separate time delays. If
one, two or three phase voltages decrease below the set value, a corresponding PICKUP
signal is generated. UV2PTUV (27) can be set to PICKUP/TRIP based on 1 out of 3, 2 out
of 3 or 3 out of 3 of the measured voltages, being below the set point. If the voltage remains
below the set value for a time period corresponding to the chosen time delay, the
corresponding trip signal is issued. The time delay characteristic is settable for step 1 and
can be either definite or inverse time delayed. Step 2 is always definite time delayed.
Default Description
5.000 Minimum operate time for inverse curves for
step 1
0.05 Time multiplier for the inverse time delay for
step 1
Enabled Enable execution of step 2
1 out of 3 Number of phases required to operate (1 of 3, 2
of 3, 3 of 3) from step 2
50 Voltage start value (DT & IDMT) in % of VBase
for step 2
5.000 Definie time delay of step 2
Default Description
1 Selection of one of the Global Base Value
groups
PhN DFT Group selector for connection type
Values (Range) Unit
- kV
- kV
- kV
Section 9
Voltage protection
Description
Voltage in phase A
Voltage in phase B
Voltage in phase C
283